Split the ref_count field of the bottom level of the vtophys map tree to
a separate array so that the pfn_2mb field can be expanded to a full 64
bits again. This doesn't change behavior for the current use as a page
frame number; it is setup work for storing an arbitrary 64-bit pointer
value in the bottom level.
Change-Id: I0bc44df3edc9df4a479229d69c2f3884d43a340d
Signed-off-by: Daniel Verkamp <daniel.verkamp@intel.com>
These APIs can be used to register/unregister regions
of pinned, huge page memory that are separate from
huge page memory allocated by the default DPDK
allocations. These APIs will be used by an upcoming
SPDK vhost-scsi target to enable SPDK to target
NVMe DMA operations directly to VM memory that has
been allocated by QEMU using pinned huge pages.
Signed-off-by: Jim Harris <james.r.harris@intel.com>
Change-Id: I649a4adeeb758b29bd29cd42c8872eed3d5d6ce9
